// Do this as the first thing so that any code reading it knows the right env.
process.env.BABEL_ENV = "development"
process.env.NODE_ENV = "development"

// Makes the script crash on unhandled rejections instead of silently
// ignoring them. In the future, promise rejections that are not handled will
// terminate the Node.js process with a non-zero exit code.
process.on("unhandledRejection", err => {
  throw err
})

// Ensure environment variables are read.
require("../config/env")

const fs = require("fs")
// @ts-ignore
const chalk = require("react-dev-utils/chalk")
const webpack = require("webpack")
const WebpackDevServer = require("webpack-dev-server")
const clearConsole = require("react-dev-utils/clearConsole")
const checkRequiredFiles = require("react-dev-utils/checkRequiredFiles")
const {
  choosePort,
  createCompiler,
  prepareProxy,
  prepareUrls,
} = require("react-dev-utils/WebpackDevServerUtils")
const openBrowser = require("react-dev-utils/openBrowser")
const paths = require("../config/paths")
const configFactory = require("../config/webpack.config")
const createDevServerConfig = require("../config/webpackDevServer.config")

const useYarn = fs.existsSync(paths.yarnLockFile)
const isInteractive = process.stdout.isTTY

// Warn and crash if required files are missing
if (!checkRequiredFiles([paths.appHtml, paths.appIndexJs])) {
  process.exit(1)
}

// Tools like Cloud9 rely on this.
// @ts-ignore
const DEFAULT_PORT = parseInt(process.env.PORT, 10) || 3000
const HOST = process.env.HOST || "0.0.0.0"

if (process.env.HOST) {
  console.log(
    chalk.cyan(
      `Attempting to bind to HOST environment variable: ${chalk.yellow(
        chalk.bold(process.env.HOST),
      )}`,
    ),
  )
  console.log(
    `If this was unintentional, check that you haven't mistakenly set it in your shell.`,
  )
  console.log(
    `Learn more here: ${chalk.yellow("https://bit.ly/CRA-advanced-config")}`,
  )
  console.log()
}

// We require that you explicitly set browsers and do not fall back to
// browserslist defaults.
// @ts-ignore
const { checkBrowsers } = require("react-dev-utils/browsersHelper")
checkBrowsers(paths.appPath, isInteractive)
  .then(() => {
    // We attempt to use the default port but if it is busy, we offer the user to
    // run on a different port. `choosePort()` Promise resolves to the next free port.
    return choosePort(HOST, DEFAULT_PORT)
  })
  // @ts-ignore
  .then(port => {
    if (port == null) {
      // We have not found a port.
      return
    }
    const config = configFactory("development")
    const protocol = process.env.HTTPS === "true" ? "https" : "http"
    const appName = require(paths.appPackageJson).name
    const tscCompileOnError = process.env.TSC_COMPILE_ON_ERROR === "true"
    const urls = prepareUrls(protocol, HOST, port)
    const devSocket = {
      // @ts-ignore
      warnings: warnings =>
        devServer.sockWrite(devServer.sockets, "warnings", warnings),
      // @ts-ignore
      errors: errors =>
        devServer.sockWrite(devServer.sockets, "errors", errors),
    }
    // Create a webpack compiler that is configured with custom messages.
    const compiler = createCompiler({
      appName,
      // @ts-ignore
      config,
      devSocket,
      urls,
      useYarn,
      // Note(sbdchd): we're using typescript but this createCompiler function
      // that expects us to be using the TSForkWebpack plugin so it will hang
      // with a message waiting for type checking. We disable these messages by
      // passing `useTypescript: false`
      useTypeScript: false,
      tscCompileOnError,
      webpack,
    })
    // Load proxy config
    const proxySetting = require(paths.appPackageJson).proxy
    const proxyConfig = prepareProxy(proxySetting, paths.appPublic)
    // Serve webpack assets generated by the compiler over a web server.
    const serverConfig = createDevServerConfig(
      proxyConfig,
      // @ts-ignore
      urls.lanUrlForConfig,
    )
    // @ts-ignore
    const devServer = new WebpackDevServer(compiler, {
      ...serverConfig,
      proxy: {
        "/v1": "http://localhost:8000",
      },
    })
    // Launch WebpackDevServer.
    // @ts-ignore
    devServer.listen(port, HOST, err => {
      if (err) {
        return console.log(err)
      }
      if (isInteractive) {
        clearConsole()
      }

      // We used to support resolving modules according to `NODE_PATH`.
      // This now has been deprecated in favor of jsconfig/tsconfig.json
      // This lets you use absolute paths in imports inside large monorepos:
      if (process.env.NODE_PATH) {
        console.log(
          chalk.yellow(
            "Setting NODE_PATH to resolve modules absolutely has been deprecated in favor of setting baseUrl in jsconfig.json (or tsconfig.json if you are using TypeScript) and will be removed in a future major release of create-react-app.",
          ),
        )
        console.log()
      }

      console.log(chalk.cyan("Starting the development server...\n"))
      openBrowser(urls.localUrlForBrowser)
    })
    ;["SIGINT", "SIGTERM"].forEach(function(sig) {
      // @ts-ignore
      process.on(sig, function() {
        devServer.close()
        process.exit()
      })
    })
  })
  // @ts-ignore
  .catch(err => {
    if (err && err.message) {
      console.log(err.message)
    }
    process.exit(1)
  })
